Programming Forums > Application Development > Visual Basic .NET

Dameon · Dec 8th, 2005, 10:46 PM

Quote:

Originally Posted by Intimidat0r

im trying to write a file manager. its got this:

string[] directories = new string[10000];
directories = System.IO.Directory.GetFiles(path);

Elaborating on one of the responses, GetFiles returns a shiny, brand new array. For that reason, directories doesn't have to be initialized ahead of time. If it is, it's a waste of cycles as 10k strings get garbage collected.

Arrays are reference-type, in other words directories is a pointer to an array of strings. The "= new string[10000]" part creates an array of ten thousand references to empty strings.
http://msdn.microsoft.com/msdnmag/issues/02/02/NET/

Rory · Dec 22nd, 2005, 10:15 PM

Damn you reference types, I want real array pointers back.
Here's your thousand real strings.

(Toggle Plain Text)

Dim PointlessPointer As IntPtr = IntPtr.Zero
For I As Int32 = 1 To 1000
   PointlessPointer = System.Runtime.InteropServices.Marshal.StringToBSTR("Dameon")
Next

Dameon · Dec 22nd, 2005, 11:32 PM

Exhuming the corpse of a long dead thread, are we Rory?

Dec 22nd, 2005, 10:15 PM	#12
Rory Expert Programmer Join Date: Jan 2005 Location: London Posts: 542 Rep Power: 4	Damn you reference types, I want real array pointers back. Here's your thousand real strings. (Toggle Plain Text) Dim PointlessPointer As IntPtr = IntPtr.Zero For I As Int32 = 1 To 1000 PointlessPointer = System.Runtime.InteropServices.Marshal.StringToBSTR("Dameon") Next Dim PointlessPointer As IntPtr = IntPtr.Zero For I As Int32 = 1 To 1000 PointlessPointer = System.Runtime.InteropServices.Marshal.StringToBSTR("Dameon") Next

Dec 22nd, 2005, 11:32 PM	#13
Dameon Troll Join Date: Apr 2005 Location: Texas Posts: 732 Rep Power: 4	Exhuming the corpse of a long dead thread, are we Rory? __________________ MD5(sig) = bcef75433db02e9ad9bf81d6f7c5c270

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)